andrey/k210-sdk-stuff
1
0
Fork 0
mirror of https://github.com/laanwj/k210-sdk-stuff.git synced 2024-11-22 01:16:20 +04:00
Code Issues Projects Releases Wiki Activity

linux: Simplify esptun by getting rid of some helper functions

Browse Source 
`cread` and `cwrite` are trivial and only called in one place, so just
integrate them.
This commit is contained in:
Wladimir J. van der Laan 2020-02-22 12:49:54 +00:00
parent 7cbb10693e
commit c261d4dcc7
1 changed files with 9 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
linux/esptun.c
View File

@ -150,36 +150,6 @@ int tun_alloc(char *dev, int flags)
return fd;
}
/**
* Read routine that checks for errors and exits if an error is
* returned (including unexpected EOF).
*/
static int cread(int fd, uint8_t *buf, int n)
{
int nread;
if ((nread = read(fd, buf, n)) <= 0) {
perror("Reading data");
exit(1);
}
return nread;
}
/**
* Write routine that checks for errors and exits if an error is
* returned (including unexpected EOF).
*/
static int cwrite(int fd, const uint8_t *buf, int n)
{
int nwrite;
if ((nwrite = write(fd, buf, n)) <= 0) {
perror("Writing data");
exit(1);
}
return nwrite;
}
/**
* Ensures we write exactly n bytes. Exit in case of error or EOF.
*/
@ -188,7 +158,10 @@ static void write_all(int fd, const uint8_t *buf, int n)
int nwrite, left = n;
while (left > 0) {
nwrite = cwrite(fd, buf, left);
if ((nwrite = write(fd, buf, left)) <= 0) {
perror("Writing data");
exit(1);
}
left -= nwrite;
buf += nwrite;
}
@ -555,8 +528,12 @@ int main(int argc, char **argv)
// Handle input from TUN
if (fds[1].revents & POLLIN) {
ssize_t nread;
/* data from tun/tap: just read it and write it to the network */
size_t nread = cread(tun_fd, tap_buffer, TAP_BUFSIZE);
if ((nread = read(tun_fd, tap_buffer, TAP_BUFSIZE)) <= 0) {
perror("Reading data from tap");
exit(1);
}
log_debug("TUN2NET %lu: Read %d bytes from the tap interface\n", tap2net, nread);